Batteries still are not charging in synch even after I top balanced them. Cell 8 jumps to over voltage and cells 6 and 7 never seem to go past 3.35. Could it be the BMS? I’ve changed the cells and copper bars.
So I got my batteries top balanced and ran the ac. All was good. Each cell discharged at a consistent rate. However, when I charged the batteries back up they stayed in sync until hitting about 85% capacity and then the last cell spiked and the BMS turn off due to over voltage. Also, the cell...
I should add that I have a bench top charger so I could charge each of the 7 cells to match the new cell. Would that be better than discharging the new cell to match the other seven?
I built a 24v battery using eight 3.2v lifepo4 cells for use in a camper van. I top balanced them a few months ago and have been using them under light loads (under 10a) and charging them at a max of 25a. A few days ago I installed a 24v air conditioner in my camper van and tested it out on the...
I have 8 new cells I am trying to top balance. Long story short I have one cell at 3.50v and the rest are 3.34. What is the best way to discharge the one cell down to 3.34 so I can start to top balance them safely? Would connecting an incandescent lightbulb to use as a resistor on the cell...
I am top balancing 4 380AH EVE cells using a Constant Voltage of 3.65. When I measure the amps I get a negative number on the red (+) wire and positive reading on the negative (-) wire. Should the red show a positive reading if I am charging the battery or are my readings correct when charging?
This is my first build using these types of cells so I want to keep things as simple as possible. So, ended up getting 4 more 272ah cells. I’m going to build a 24v bank from the 8 272ah cells and a 12v bank from the 280ah cells. I’ll put the 24v bank in a van I’m converting and use 12v bank for...